keeps one's lips sealed

Withholds the secret

To keep one's lips sealed is to remain silent about something, especially a secret or sensitive information.

The image is of lips pressed together, preventing words from escaping.

I'll tell you what happened, but you have to keep your lips sealed.

Often appears as a promise: My lips are sealed.

Related

restraint · prudence · off the record · clandestine · discretion · covert · need to know · mum · quiet · unspoken · integrity · loyalty · faithfulness · reliability · dependability · tactfulness · taciturn · bite your tongue

Opposites
disclosure of information

keeps one's lips sealedblabs

Reveals secrets carelessly

spills the beans · lets the cat out of the bag · tells all · blurts out · divulges

trustworthiness with secrets

keeps one's lips sealedsnitches

Those who betray confidences

tells tales · stabs in the back

verbal restraint

keeps one's lips sealedchatters

Talks fast, trivially

gossips · gabs · prattles · yaps · motormouth

Family

keep, keeps, keeping, kept, keeper, keepers, one, ones, lip

Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G